Yup. That's the plan. Get back to the moon and THAT would be our launch pad for Martain missions.
But you gotta give NASA the money to do it. You can't just say "Go to Mars" and then "Go to everything else we tell you to do without any more money". So, the current Administration has ordered NASA to go over it's books and see what can be scrapped in order to fund the Ares/Constellation buildups. As it stands now, NASA must pick and choose what gets the appropriate resources and money.
That makes sense. And since we're dealing with the Government here, I somehow doubt that's the reason. Poor NASA... They get so much shit...